共查询到20条相似文献，搜索用时 93 毫秒
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目的：以“中国数字人男一号”CT图像、MRI图像为研究素材,对同一人体同期CT图像与MRl图像进行融合,并对融合效果进行比较评价。在此基础上实现同期CT图像与MRI图像的三维融合重建图像。方法：首先介绍小波变换图像融合方法、算法、图像融合过程与步骤;然后对CT图像进行骨骼组织分割;其次,通过使用图像预处理及二维空间变换处理,解决两种骨骼组织分割图像参数差异较大的问题;最后,对这两种模式的骨骼组织分割图像在配准的基础上进行融合,并给出融合结果。结果：实现了CT图像和MRI图像的二维空间融合及三维重建。结论：小波变换图像融合方法对常用的CT／MRI图像融合及三维重建是一种有效的方法。 相似文献
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提出了CT图像挖掘的概念，描述了图像挖掘技术在CT图像上的具体应用及实现．针对医院中每天产生并存储的大量有价值的医学CT图像，结合医学上所特有的领域知识，提出了一种通过对医学CT图像进行图像挖掘，可以将医学CT图像分成有病或无病两类的方法．该方法的实现对帮助医生及早诊断出恶性病变具有重大的意义。 相似文献
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三维人体模型生成是近年来的研究热点,在虚拟现实和游戏领域中有很多应用。提出了一种针对二维图像的人体模型生成方法,首先利用图像分割技术提取出平面人物图像的轮廓,然后通过三维空间中的仿射变换生成三维人体模型,该模型拥有可形变、低复杂度等特点。实验证明,该方法能有效将二维图像与三维人体图形相结合,具备实时性和高效性。 相似文献
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张志宏 《晋东南师范专科学校学报》2009,(2):26-28
文章介绍了医学图像处理的基本技术,对图像分割、图像配准、图像融合、伪彩色处理和纹理分析技术进行了综述。介绍了三维医学图像的可视化和基于PACS的医学图像压缩在医学图像处理方面的应用。 相似文献
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文章介绍了医学图像处理的基本技术,对图像分割、图像配准、图像融合、伪彩色处理和纹理分析技术进行了综述.介绍了三维医学图像的可视化和基于PACS的医学图像压缩在医学图像处理方面的应后. 相似文献
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由于micro CT图像的成像原理和组织特性导致的多样性和复杂性,针对小鼠CT图像,单一的图像分割方法难以取得良好的分割结果。结合当前医学图像分割方法,提出将阈值分割和基于Amira软件的交互式分割相结合的方法。针对不同的器官组织,根据对象灰度特征、形状、空间分布以及边缘分布等信息,使用不同的分割方法及工具进行逐一分割,最后将不同的器官融合成完整的分割后CT图像。该半自动交互式分割方法结合了两者的特点,可实现小鼠CT图像的准确分割。 相似文献
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Experimental evidence for improved neuroimaging interpretation using three-dimensional graphic models 总被引：1，自引：0，他引：1
Ruisoto P Juanes JA Contador I Mayoral P Prats-Galino A 《Anatomical sciences education》2012,5(3):132-137
Three-dimensional (3D) or volumetric visualization is a useful resource for learning about the anatomy of the human brain. However, the effectiveness of 3D spatial visualization has not yet been assessed systematically. This report analyzes whether 3D volumetric visualization helps learners to identify and locate subcortical structures more precisely than classical cross-sectional images based on a two dimensional (2D) approach. Eighty participants were assigned to each experimental condition: 2D cross-sectional visualization vs. 3D volumetric visualization. Both groups were matched for age, gender, visual-spatial ability, and previous knowledge of neuroanatomy. Accuracy in identifying brain structures, execution time, and level of confidence in the response were taken as outcome measures. Moreover, interactive effects between the experimental conditions (2D vs. 3D) and factors such as level of competence (novice vs. expert), image modality (morphological and functional), and difficulty of the structures were analyzed. The percentage of correct answers (hit rate) and level of confidence in responses were significantly higher in the 3D visualization condition than in the 2D. In addition, the response time was significantly lower for the 3D visualization condition in comparison with the 2D. The interaction between the experimental condition (2D vs. 3D) and difficulty was significant, and the 3D condition facilitated the location of difficult images more than the 2D condition. 3D volumetric visualization helps to identify brain structures such as the hippocampus and amygdala, more accurately and rapidly than conventional 2D visualization. This paper discusses the implications of these results with regards to the learning process involved in neuroimaging interpretation. 相似文献
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介绍了VTK特点、体系结构、对象模型等,着重描述图形对象、可视化对象、流水线和图像处理。针对医学图像需要,使用VTK开发了一个小型医学三维可视化软件。实验结果表明,与使用OpenGL相比,使用VTK可以节约大量时间,开发出的软件更加标准和规范。 相似文献
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Advances in computer and interface technologies have made it possible to create three‐dimensional (3D) computerized models of anatomical structures for visualization, manipulation, and interaction in a virtual 3D environment. In the past few decades, a multitude of digital models have been developed to facilitate complex spatial learning of the human body. However, there is limited empirical evidence to guide the development and integration of effective computer models for teaching and learning. The purpose of this article is to describe the development of a dynamic head and neck model with flexible displays (2D, 3D, and stereoscopic 3D) and interactive control features that can be later used to design and test the efficacy of computer models as a means of improving student learning. The model was created using computer tomography scans of a human cadaver. Anatomical structures captured on the scans were segmented into discreet areas, and then reconstructed in three‐dimensions using specialized software. The final model consists of 70 distinct anatomical structures that can be displayed in 2D, 3D, or stereoscopic 3D. In 3D mode, a mouse can be used to actively and continuously interact with the model by manipulating viewer orientation, altering surface transparency, superimposing 2D scans with 3D reconstructions, removing or adding structures sequentially, and customizing animated scenes to show complex anatomical pathways or relationships. Anat Sci Educ 2: 294–301, 2009. © 2009 American Association of Anatomists. 相似文献
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基于IMAGIS的校园房产三维可视化应用研究 总被引：1，自引：0，他引：1
况代智 《泉州师范学院学报》2007,25(6):75-78
运用GIS三维可视化软件IMAGIS的三维建模功能,以校园的二维数字线划图为基础,进行校园房产建筑物三维模型的构建,通过模型的生成、纹理映射及3DGIS虚拟漫游,实现校园房产的三维可视化. 相似文献
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A real-time monitoring and 3D visualization analysis system is proposed for dam foundation curtain grouting. Based on the real-time control technology, the optimization method and the set theory, a mathematical model of the system is established. The real-time collection and transmission technology of the grouting data provides a data foundation for the system. The real-time grouting monitoring and dynamic alarming method helps the system control the grouting quality during the grouting process, thus, the abnormalities of grouting, such as jacking and hydraulic uplift, can be effectively controlled. In addition, the 3D grouting visualization analysis technology is proposed to establish the grouting information model (GIM). The GIM provides a platform to visualize and analyze the grouting process and results. The system has been applied to a hydraulic project of China as a case study, and the application results indicate that the real-time grouting monitoring and 3D visualization analysis for the grouting process can help engineers control the grouting quality more efficiently. 相似文献
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在输变电GIS三维可视化过程中,建立电力线路要素三维模型库是非常重要的。本文给出了建立三维模型库的方法。使用3DMAX作为建模工具,并用OSG做为底层的渲染基础框架设计了8种电力线路模型原型,提出了动态模型实列的概念和分页加载渲染的方法,制定了数据存储格式与标准,使得GIS系统能够直接从模型库中调用线路杆塔模型,实现了输电线路的三维全景仿真。 相似文献
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廖平 《宁波职业技术学院学报》2005,9(2):38-40
介绍了3DS Max建造的三维几何模型的ASE文件数据存储格式，说明了ASE文件的读取方法，结合OpenGL与Delphi开发出深海采矿作业系统可视化软件。 相似文献
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牛志宏 《长江工程职业技术学院学报》2006,23(4):51-53
三维地形可视化仿真技术是虚拟现实的重要手段之一,主要研究真实感三维地形建模和三维地形可视化的实时绘制.本文对光照模型、纹理映射技术、阴影、场景的特效生成、实时消隐技术、层次细节简化技术等三维地形可视化仿真关键技术进行了分析. 相似文献
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Leah Labranche Timothy D. Wilson Mark Terrell Randy J. Kulesza 《Anatomical sciences education》2022,15(2):291-303
Three-dimensional (3D) digital anatomical models show potential to demonstrate complex anatomical relationships; however, the literature is inconsistent as to whether they are effective in improving the anatomy performance, particularly for students with low spatial visualization ability (Vz). This study investigated the educational effectiveness of a 3D stereoscopic model of the pelvis, and the relationship between learning with 3D models and Vz. It was hypothesized that participants learning with a 3D pelvis model would outperform participants learning with a two-dimensional (2D) visualization or cadaveric specimen on a spatial anatomy test, particularly when comparing those with low Vz. Participants (n = 64) were stratified into three experimental groups, who each attended a learning session with either a 3D stereoscopic model (n = 21), 2D visualization (n = 21), or cadaveric specimen (n = 22) of the pelvis. Medical and pre-medical student participants completed a multiple-choice pre-test and post-test during their respective learning session, and a long-term retention (LTR) test 2 months later. Results showed no difference in anatomy test improvement or LTR performance between the experimental groups. A simple linear regression analysis showed that within the 3D group, participants with high Vz tended to retain more than those with low Vz on the LTR test (R2 = 0.31, P = 0.01). The low Vz participants may be cognitively overloaded by the complex spatial cues from the 3D stereoscopic model. Results of this study should inform resource selection and curriculum design for health professional students, with attention to the impact of Vz on learning. 相似文献
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An approach for generating interactive 3D graphical visualization of the genetic architectures of complex traits in multiple environments is described. 3D graphical visualization is utilized for making improvements on traditional plots in quan- titative trait locus (QTL) mapping analysis. Interactive 3D graphical visualization for abstract expression of QTL, epistasis and their environmental interactions for experimental populations was developed in framework of user-friendly software QTLNetwork (http://ibi.zju.edu.cn/software/qtlnetwork). Novel definition of graphical meta system and computation of virtual coordinates are used to achieve explicit but meaningful visualization. Interactive 3D graphical visualization for QTL analysis provides geneticists and breeders a powerful and easy-to-use tool to analyze and publish their research results. 相似文献